Innegra cloth is comparable in strength to carbon fiber. It is less expensive and easier to work with then carbon fiber cloth. Adding a layer of Innegra cloth to the bottom of your waveski will help avoid damage when surfing in rocky areas. The Innegra will add less the 1 pound to the overall weight of the waveski. If you are hard on your gear it is well worth it. Innegra is white and not transparent like fiberglass so you cannot do any airbrush graphics.